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8a523922 1/* Internal definitions and declarations for UTMP functions.
688903eb 2 Copyright (C) 1996-2018 Free Software Foundation, Inc.
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3 This file is part of the GNU C Library.
4 Contributed by Ulrich Drepper <drepper@cygnus.com>
5 and Paul Janzen <pcj@primenet.com>, 1996.
6
7 The GNU C Library is free software; you can redistribute it and/or
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8 modify it under the terms of the GNU Lesser General Public
9 License as published by the Free Software Foundation; either
10 version 2.1 of the License, or (at your option) any later version.
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11
12 The GNU C Library is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
41bdb6e2 15 Lesser General Public License for more details.
8a523922 16
41bdb6e2 17 You should have received a copy of the GNU Lesser General Public
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18 License along with the GNU C Library; if not, see
19 <http://www.gnu.org/licenses/>. */
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20
21#ifndef _UTMP_PRIVATE_H
22#define _UTMP_PRIVATE_H 1
23
24#include <utmp.h>
ec999b8e 25#include <libc-lock.h>
8a523922 26
8f2ece69 27/* The structure describing the functions in a backend. */
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28struct utfuncs
29{
8f2ece69 30 int (*setutent) (void);
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31 int (*getutent_r) (struct utmp *, struct utmp **);
32 int (*getutid_r) (const struct utmp *, struct utmp *, struct utmp **);
33 int (*getutline_r) (const struct utmp *, struct utmp *, struct utmp **);
34 struct utmp *(*pututline) (const struct utmp *);
35 void (*endutent) (void);
76b87c03 36 int (*updwtmp) (const char *, const struct utmp *);
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37};
38
76b87c03 39/* The tables from the services. */
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40extern const struct utfuncs __libc_utmp_file_functions attribute_hidden;
41extern const struct utfuncs __libc_utmp_unknown_functions attribute_hidden;
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42
43/* Currently selected backend. */
b2637a22 44extern const struct utfuncs *__libc_utmp_jump_table attribute_hidden;
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45
46/* Current file name. */
ab26a24a 47extern const char *__libc_utmp_file_name attribute_hidden;
76b87c03 48
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49/* Locks access to the global data. */
50__libc_lock_define (extern, __libc_utmp_lock attribute_hidden)
51
52
8a523922 53#endif /* utmp-private.h */